1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c
index 7654c5606307..7b445e88a0d5 100644
--- a/drivers/base/power/opp/cpu.c
+++ b/drivers/base/power/opp/cpu.c
@@ -10,6 +10,9 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
 #include <linux/err.h>
@@ -124,12 +127,12 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
         struct device *dev;
         int cpu, ret = 0;
 
-        rcu_read_lock();
+        mutex_lock(&dev_opp_list_lock);
 
         dev_opp = _find_device_opp(cpu_dev);
         if (IS_ERR(dev_opp)) {
                 ret = -EINVAL;
-                goto out_rcu_read_unlock;
+                goto unlock;
         }
 
         for_each_cpu(cpu, cpumask) {
@@ -150,10 +153,10 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
                         continue;
                 }
         }
-out_rcu_read_unlock:
-        rcu_read_unlock();
+unlock:
+        mutex_unlock(&dev_opp_list_lock);
 
-        return 0;
+        return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus);